. Question 2 v Choose the correct phrase to complete the statement: A T-Distribution is used instead of the Z-Distribution whenever '33:? s is used as an estimate for 0' '33:? a student is doing the probLem since T is referred to as 'Student's T-Distribution' '3' sample size is Less than 30 '1} 0' is known . Question 3 v Select the correct statement: When building a CI for a population mean, '3' if building a Z-interval, you always need a sample size of at least 30 '13:} if the population is not known to be normally distributed, you need a sample size of at least thirty 0' if building a T-lnterval, you always need r1 For a given Level of Confidence, C, the Critical Value To will get closer to Zc as the Degrees of Freedom increase. This is because: '33:? T is used when using 3 to estimate :7, and the larger the sample size, the more accurate .3 gets as an estimate for 0' '33:? 0' gets smaller as the sample size increases '3' the population changes as the sample size increases '13' 5 gets smaller as the sample size increases 0 Question 5 v Two biologists are trying to estimate the population mean length of trout in a stream. They each build a Cl based on their own sample data, and the sample sizes were the same. Here are their T-intervals: First biologist: 95% Cl is: 8.5 a: ,u ~